(19)

(11)

EP 0 981 885 A1

(12)

(43) Date of publication: 01.03.2000 Bulletin 2000/09 (21) Application number: 98931565.0 (22) Date of filing: 23.06.1998

(51) International Patent Classification (IPC)7: H04L 29/08, H04L 29/06 (86) International application number: PCT/US9813/153 (87) International publication number: WO 9859/481 (30.12.1998 Gazette 1998/52)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 25.06.1997 US 48946 P (71) Applicant: Inforonics, Inc. Littleton, MA 01460-2114 (US)	(72) Inventor: BUCKLAND, Bruce, H. Concord, MA 01742 (US) (74) Representative: Froud, Clive et al Elkington and FifeProspect House8 Pembroke Road Sevenoaks, Kent TN13 1XR Sevenoaks, Kent TN13 1XR (GB)